Electrolytic solution.



Human Status Patient l mos,

OTTO MEYER, OF RICHMOND, VIRGINIA.

ELECTROLYTIC SOLUTION.

SPECIFICATION forming part of Letters Patent No. 691,158, dated January 14, 1902.

Application filed August 22, 1901. Serial No. 72,946. (No specimens.)

T0 to whom it may concern:

Be it known that I, OTTO MEYER, a citizen of the United States, residing at Richmond, in the county of Henrico and State of Virginia, have invented certain new and useful Improvements in Electrolytic Solutions; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to Which it appertains to make and use the same.

This invention relates to improvements in electrolytes for electrogalvaniziug; and it consists in mixing certain quantities of zinc salts, magnesium salts, and dextrine with a proper quantity of water, whereby an electrolytic solution will be produced which is capable of electrogalvanizing such metals as iron and copper with a hard and adhesive coating of fine appearance.

It also consists in certain other mixtures of certain salts with dextrine and water,as will be hereinafter fully described and claimed.

My invention is designed for the simplifying and perfecting of the process of electrogalvanizing certain metals, such as iron, copper, or the like; and for accomplishing my purpose I take certain parts of zinc saltsas, for instance, sulfate of zinc and certain parts of magnesium salts, as sulfate of magnesium, together with certain parts of dextrin and dissolve the same with a suitable quantity of Water or until a certain specific gravity is attained, the solution then being ready for use as an electrolyte for electrogalvanizing. It might be remarked here that no heat is necessary in the preparation of this solution, as is the case With some other solutions produced for electrogalvanizing. I find an electrolyte produced by a mixture of the following parts to have proven repeatedly successful in electrogalvanizing, giving a hard and adhesive coating and line appearance to metal so treated. I take six parts of sulfate of zinc and six parts of sulfate of magnesium, together with one part of dextrine, and dissolve a sufficient quantity of this mixture in water to give a specific gravity of about 18 Baum.

Although a mixture in which the ingredients are taken in these proportions is found very efficient, yet I do not wish to be understood as limiting myself to these proportions, as I find they can be varied considerably Without greatly diminishing the effectiveness of the electrolyte. As heretofore intimated, I may employ also other salts of zinc or magnesiumas, for instance, the chlorid of zinc and the chlorid of magnesium may be substituted for the sulfates where they are cheaper and more easily obtained. I also find that results similar to those above mentioned can be obtained by substituting for a part of the magnesium salt employed an aluminium salt, arranging the ingredients somewhat as follows: Take six parts of the sulfate of zinc to three parts of the sulfate of magnesium and three parts of the sulfate of alumina and one part of deXtrine, mixing the same With water, as before, to obtain a specific gravity.

In electrogalvanizing when using this electrolyte I preferably employ zinc cathodes, although I might use magnesium cathodes, if the same are more easily obtainable. As to the current density used, I attain good results by working with about seven to eight amperes per square foot of cathode surface.

I am aware that certain salts have been arranged With zinc salts for producing electrolytic solutions, but I am not aware that zinc salts, together with magnesium or aluminium salts and dextrine, have ever been used for this purpose heretofore and find that such an electrolyte is very effective in the coating of iron or copper with a hard adhesive surface of fine appearance.

Having now described my invention, What I claim, and desire to secure by Letters Patent, is

1. An electrolytic solution containing zinc salts, magnesium salts and dextrine dissolved in water, substantially as described.

2. An electrolytic solution, containing sulfate of zinc and sulfate of magnesium, dextrine and water, the solution having a specific gravity of about 18 Baum, substantially as described.

3. An electrolytic solution containing six ium salts and dextrine, in water, substzur parts of sulfate of zincQsix parts of the sultially as described. 10 fate of magnesia, with one part of dextrine, In testimony whereof I hereunto affix my dissolved in Water, the solution having a spesignature in presence of two witnesses.

5 cific gravity of about 18 Baum, substan- OTTO MEYER.

tially as described. Witnesses:

4. An electrolytic solntion,c0ntaining zinc GEO. S. TALLEY, salts together with magnesium and alumin- R. T. LACY. 

